New Motor Running Like Crap
New Motor Running Like Crap I'm running out of ideas of what to do to get my car to run how it should. I have a really bad shutter/miss between 2000-3000 RPMs when just crusing and WOT misses under 5000 then it cleans up. It runs really good cold, but once its up to temp (~170*) it starts to break up which is making me think its not the Opti. So far I have replaced......
MAP Sensor
Map Pigtail
Opti Wiring Harness
Throttle Position Sensor
Water Temp Sensor on WP
Plugs Gapped @ .050 (may be part of it)
Wires (None Burnt or Loose)
I may have forgotten something
I'm now going to replace my plugs again and gap them to .0?? and I'm going to order some new 02 sensors.
I ran a scan and all it was showing was MAP reading high, but from what I have read it may be the cams fault. Its pulling good vaccum, but its running rich on the drivers side, but I have a small exhaust leak that needs to be taken car of.
I was about to order a new Opti, but it runs good when its cold, but as soon as its warmed up it starts to break up and shutter and not want to idle. A friend of mine has some tuning software now, so I may let him have a go at it and see if it gets any better, but I really guess it can't get any worse.
Other than a dyno tune (I can't afford that right now) what are your suggestions? Any help will be appreciated
MAP Sensor
Map Pigtail
Opti Wiring Harness
Throttle Position Sensor
Water Temp Sensor on WP
Plugs Gapped @ .050 (may be part of it)
Wires (None Burnt or Loose)
I may have forgotten something
I'm now going to replace my plugs again and gap them to .0?? and I'm going to order some new 02 sensors.
I ran a scan and all it was showing was MAP reading high, but from what I have read it may be the cams fault. Its pulling good vaccum, but its running rich on the drivers side, but I have a small exhaust leak that needs to be taken car of.
I was about to order a new Opti, but it runs good when its cold, but as soon as its warmed up it starts to break up and shutter and not want to idle. A friend of mine has some tuning software now, so I may let him have a go at it and see if it gets any better, but I really guess it can't get any worse.
Other than a dyno tune (I can't afford that right now) what are your suggestions? Any help will be appreciated
Teching In
Joined: Jun 2006
Posts: 48
Likes: 0
i just replace the 02 sensors on my 95 ta i could drive for about 5 to 10 min it ran good then soon as it warmed up it would spit and spuder barley pull it self and you could smell the gas when you stand behind the car coming from the tail pipes after i changed the 02 sensors reset the couputer it rand good agian
TECH Enthusiast
Joined: Jul 2003
Posts: 697
Likes: 0
From: Evansville, IN
Sounds like it runs good until it goes into closed loop. I would look at replacing the O2 sensors, and or check the wiring. A bad O2 can cause the car to run rich and can foul out plugs. I would check your plugs to.
Well I just changed the plugs again, I'm on my 3rd set and there is only 60 miles on my new motor. The plugs are getting fouled because its running really rich. I have 2 more sets of TR55s sitting in my garage, but I was going to wait until I got the new O2s before I ruin another set of plugs.
Ok the O2s are going to be ordered in about 15 minutes, or as soon as I find some A/Cs online. And when I replace the O2s I'll fix my small exhaust leak and the plugs, but what should I gap my plugs too???
Thanks for the replies guys
Ok the O2s are going to be ordered in about 15 minutes, or as soon as I find some A/Cs online. And when I replace the O2s I'll fix my small exhaust leak and the plugs, but what should I gap my plugs too???
Thanks for the replies guys
